從n對觀測值的樣本中獲得的相關系數(shù)的可能誤差是sqrt((1-r2)/(n-2))。
預言家在自己的國家及家庭里總是不受尊重。
The press is the best instrument for enlightening the mind of man, and improving him as a rational, moral and social being.
Life is like a bracelet...It has little jewels around it which are like the little bright moments that come along in our lives every now and then...
我的失明不是悲劇，只是另一種看待世界的方式。
In theory, there is no difference between theory and practice. But, in practice, there is.